| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 8 | |
| #2 | United Kingdom | 5 | |
| #3 | Germany | 4 | |
| #4 | France | 4 | |
| #5 | Canada | 2 | |
| #6 | Italy | 2 | |
| #7 | Sweden | 2 | |
| #8 | Switzerland | 1 | |
| #9 | Japan | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Venting or aerating devices | |
| #2 | Unspecified technologies | |
| #3 | Unspecified technologies | |
| #4 | Pipes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Nelson Donald R | 9 |
| #2 | Nelson D R | 2 |
| #3 | Nelson Donald Rolophe | 2 |
| #4 | Haatoree Efu Gurandein Jiyunia | 1 |
| #5 | Grandin H | 1 |
| #6 | Parent Joseph V | 1 |
| #7 | Rolophe Nelson Donald | 1 |
| #8 | Donarudo Rorofue Neruson | 1 |
| #9 | Zakaitis Robert C | 1 |
| #10 | Grandin Hartley F Jr | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4911202A | Valve construction | |
| US4844411A | Valve | |
| US4182372A | Mixing valve | |
| GB1565888A | Mixing valve | |
| US3809124A | Mixing valve | |
| US3648723A | Valve | |
| FR1533823A | Register valve | |
| US3430990A | Coupling | |
| US3471122A | Top entry valve | |
| US3404865A | Cryogenic valve | |
| CA872105A | Top entry valve |